Пошаговое объяснение:
1) (x + 17) ÷ 4 = 20 2) 72 ÷ (x - 3) = 8
x + 17 = 20 × 4 x - 3 = 72 ÷ 8
x + 17 =80 x - 3 = 9
x = 80 - 17 x = 9 + 3
x = 63 x = 12
Пошаговое объяснение:
1) (x + 17) ÷ 4 = 20 2) 72 ÷ (x - 3) = 8
x + 17 = 20 × 4 x - 3 = 72 ÷ 8
x + 17 =80 x - 3 = 9
x = 80 - 17 x = 9 + 3
x = 63 x = 12